How does one pick the best hamburger? With so many good ones in the Valley, it's like choosing a favorite child. But once in a while, a dark horse enters the race and pleasantly jolts you as you consider the possibilities of the Scottsdale/Central Phoenix/Tempe axis. This year, the honor takes us alllll the way up to Surprise (yes, Surprise), where we fell in love with New York Flavor's basil mascarpone burger. With its nicely seasoned and well-prepared handmade beef patty between a grilled soft bun from Tempe's Jonathan Robins Bakery topped with luscious mascarpone, caramelized onions, moist strips of grilled portobello mushrooms, and long, vibrantly flavored ribbons of basil, we were satisfyingly stunned. Sure, there are a lot of other good items on the restaurant's menu, but it's the burger we're thinking about on the long drive home.